package com.juzi.statictoolclass.demo;

public class Demo {
    public static void main(String[] args) {
        int[] arr = null;
        int[] arr1 = {};
        int[] arr2 = {12,34,56,78};

        System.out.println(ArrayUtil.toString(arr));
        System.out.println(ArrayUtil.toString(arr1));
        System.out.println(ArrayUtil.toString(arr2));
    }
}
